• Function type
• Information number
The IEC 60870-5-103 profile contains a complete listing of all events produced by the device.
2.2.6 General Interrogation (GI)
The GI request can be used to read the status of the device, the function numbers, and information
numbers that will be returned during the GI cycle. These are shown in the IEC 60870-5-103 profile.
2.2.7 Cyclic Measurements
The device will produce measured values using ASDU 9. ASDU9 is reported with information number
148 and 155. These frames are reported alternately. This can be read from the device using a Class 2
poll. For every query, the current online data is reported.
The device transmits its measurands at 2.4 times the rated value of the analogue value.
2.2.8 Commands
The list of commands supporting the P253 relay are shown in the table below. The device will respond
to valid Control Command with ASDU1 and a cause of transmission indicating ‘Positive (COT-20) /
Negative (COT-21) acknowledgement’. The device will respond to commands with invalid FUN/ INF
combination with an ASDU 1, with a cause of transmission indicating ‘negative acknowledgement’.
2.2.9 Test Mode
It is possible to enable test mode in the relay using either the front panel menu or with P50 Agile
configurator. An event will be produced to indicate both entry to and exit from test mode. Spontaneous
events and cyclic measured data transmitted whilst the device is in test mode will have a COT of ‘test
mode’.
2.2.10 Disturbance Records
The disturbance records are stored in uncompressed format and can be extracted using the standard
mechanisms described in IEC 60870-5-103. This relay supports up-to 5 records.
2.2.11 Configuration
To configure the IED for this protocol, please see the Configuration chapter.
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